
Audience learn about the green energy in a building at the China Hi-Tech Fair in Shenzhen, south China's Guangdong Province, Nov. 19, 2016. The latest achievements in science and technology were displayed there. (Xinhua/Mao Siqian)
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Audience learn about the green energy in a building at the China Hi-Tech Fair in Shenzhen, south China's Guangdong Province, Nov. 19, 2016. The latest achievements in science and technology were displayed there. (Xinhua/Mao Siqian)